Interrupt latency measured at ~15 µs on 33 MHz 486. Driver adds ~2 µs processing. Polling mode (for systems without IRQ) gives 500 Hz update rate at 1 ms polling interval.
BT5.2 mouse drivers operate across several platforms to maintain the Bluetooth LE (Low Energy) stack: bt52 mouse driver
Standard Bluetooth mice utilize generic drivers already built into Windows and macOS. Interrupt latency measured at ~15 µs on 33 MHz 486